155688

Appears in sequences

• Number of permutations of length n which avoid the patterns 1342, 3241, 4312.at n=11A116843
• Number of endofunctions on [n] with distinct cardinalities of the nonempty preimages.at n=8A231807
• Number T(n,k) of endofunctions on [n] such that at most k elements with nonempty preimage have equal preimage cardinality and non-equinumerous preimages have cardinalities that differ by at least k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=37A231915